An outlaw, in its original and legal meaning, is a person declared as outside the protection of the law. In pre-modern societies, all legal protection was withdrawn from the criminal, so anyone was legally empowered to persecute or kill them. Outlawry was thus one of the harshest penalties in the legal system. In early Germanic law, the death penalty is conspicuously absent, and outlawing is the most extreme punishment, presumably amounting to a death sentence in practice. The concept is known from Roman law, as the status of homo sacer, and persisted throughout the Middle Ages.

Germanic law is a scholarly term used to describe a series of commonalities between the various law codes of the early Germanic peoples. These were compared with statements in Tacitus and Caesar as well as with high and late medieval law codes from Germany and Scandinavia. Until the 1950s, these commonalities were held to be the result of a distinct Germanic legal culture. Scholarship since then has questioned this premise and argued that many "Germanic" features instead derive from provincial Roman law. Although most scholars no longer hold that Germanic law was a distinct legal system, some still argue for the retention of the term and for the potential that some aspects of the Leges in particular derive from a Germanic culture. Scholarly consensus as of 2023 is that Germanic law is best understood in opposition to Roman law, in that it was not "learned" and incorporated regional pecularities.